Coffee machine



FIG. 1 is a front perspective view of a coffee machine showing our new design;

FIG. 2 is rear perspective view of the embodiment of FIG. 1;

FIG. 3 is a front elevation view of the embodiment of FIG. 1;

FIG. 4 is a rear elevation view of the embodiment of FIG. 1;

FIG. 5 is a top elevation view of the embodiment of FIG. 1;

FIG. 6 is a right side elevation view of the embodiment of FIG. 1; and,

FIG. 7 is a left side elevation view of the embodiment of FIG. 1. 

CLAIM The ornamental design for a coffee machine, as shown and described. 